NEC N8100-1056F, User Manual

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4-44 Configuring Your Server
RAID Configuration of Serial ATA Hard Disk Drive
Your server includes the serial ATA RAID controller by supporting the RAID levels 0 and 1.
You need two SATA (serial ATA) hard disk drives for configuration.
„
RAID0 (striping)
Stores data on two hard disk drives by dividing it (striping). Both hard disk drives can be
accessed at the same time. This improves disk access performance compared with using a
single hard disk drive.
IMPORTANT:
„
RAID0 does not have data redundancy. When a hard disk drive
failure occurs, data cannot be restored.
„
Logical capacity of the array becomes a multiple of the connected
hard disk drive.
„
RAID1 (mirroring)
Stores the data being saved to one hard disk dive to another hard disk drive. This method
is called "mirroring." When storing data onto one hard disk drive, the same data is
simultaneously stored onto another hard disk drive. When a hard disk drive becomes
faulty, the one with the same data can be used. This provides operation without the system
going down.
IMPORTANT:
„
RAID1 reads or writes data to/from the two hard disk drives at the
same time. The disk access performance is lower than the single
disk.
„
Logical capacity of the array is equal to one hard disk drive
connected.
Installing the Hard Disk Drives
Install the two serial ATA hard disk drives to your server. Refer to Chapter 9 for detail.
IMPORTANT:
Use two hard disk drives of the same revolution. In
addition, use two hard disk drives of the same capacity if you are going
to configure RAID1.